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Asset Retirement Obligations (Tables) | 9 Months Ended
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Sep. 30, 2023
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligations | The following schedule shows the change in our asset retirement obligations for the nine months ended September 30, 2023 (dollars in thousands):
| 2023
Asset retirement obligations at January 1, 2023 | $ | 797,762 |
Changes attributable to: |
Accretion expense | 32,763 |
Settlements | (5,750) |
Estimated cash flow revisions | 70,405 |
Asset retirement obligations at September 30, 2023 | $ | 895,180 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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